Unity 2018 Shaders and Effects Cookbook - Third Edition

Accessing a vertex color in a Surface Shader

Let's begin this chapter by taking a look at how we can access the information of a model's vertex using the vertex function in a Surface Shader. This will arm us with the knowledge to start utilizing the elements contained within a model's vertex in order to create really useful and visually appealing effects.

A vertex in a vertex function can return information about itself that we need to be aware of. You can actually retrieve the vertices' normal directions as a float3 value and the position of the vertex as float3, and you can even store color values in each vertex and return that color as float4. This is what we will take a look at in this recipe. We need to see how to store color information ...